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C
OMMAND
L
INE
I
NTERFACE
3-174
Related Commands
permit, deny 3-175
ip access-group (3-179)
show ip access-list (3-180)
permit
,
deny
(Standard ACL)
Use this command to add a rule to a Standard IP ACL. The rule sets a
filter condition for packets emanating from the specified source. Use the
no
form to remove a rule.
Syntax
{
permit | deny
}
{
any
|
source bitmask |
host
source
}
no
{
permit | deny
} {
any
|
source bitmask |
host
source
}
•
any
– Any source IP address.
•
source
– Source IP address.
•
bitmask
– Decimal number representing the address bits to match.
•
host
– Keyword followed by a specific IP address.
Default Setting
None
Command Mode
Standard ACL
Command Usage
• New rules are added to the end of the list.
• Address bitmasks are similar to a subnet mask, containing four integers
from 0 to 255, each separated by a period. The binary mask uses 1 bit
to indicate “match” and 0 bits to indicate “ignore.” The bitmask is
bitwise ANDed with the specified source IP address, and then
compared with the address for each IP packet entering the port(s) to
which this ACL has been assigned.
Summary of Contents for 6724AL2
Page 2: ......
Page 404: ...COMMAND LINE INTERFACE 3 216 ...
Page 406: ...TROUBLESHOOTING A 2 ...
Page 418: ...GLOSSARY Glossary 8 ...
Page 422: ...INDEX Index 4 ...
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